/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package web;

import ejb.BusinessLogic;
import ejb.Carrello;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.ejb.EJB;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Lella
 */
@WebServlet(name = "Compra", urlPatterns = {"/Compra"})
public class Compra extends HttpServlet {

    @EJB
    private BusinessLogic businessLogic;

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        HttpSession s = request.getSession();
        String username = (String) s.getAttribute("username");
        List<Carrello> cart = businessLogic.getUserCarrello(username);
        for (int i = 0; i < cart.size(); i++) {
            Carrello c = cart.get(i);
            String art = c.getId().toString();
            if (request.getParameter(art) != null && request.getParameter(art).equals("compra")) {
                int quantita = Integer.valueOf(request.getParameter("quantita_" + art));
                businessLogic.addToStorico(c, quantita, username);
                businessLogic.decrementaQuantita(c, quantita);
            }
            if (request.getParameter(art) != null && request.getParameter(art).equals("elimina")) {
                int quantita = Integer.valueOf(request.getParameter("quantita_" + art));
                businessLogic.decrementaQuantita(c, quantita);
                businessLogic.mettiInVendita(c.getArticolo(), quantita);
            }

        }
        ServletContext sc = request.getServletContext();
        RequestDispatcher rd = sc.getRequestDispatcher("/carrello.jsp");
        rd.forward(request, response);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}